The purpose of this study was to clarify the sense of trust of high school students from identity developmental aspect. The questionnaire to measure sense of trust was developed as trust scale. It consisted of three dimensions: “distrust”,“trust for self” and “trust for others”. Eight-hundred-five high school students were administered the trust scale, SD scale for trust and distrust images and identity status scale. The result of multiple regression was that trust for self and for others were critical for present and future “commitment” of ego-identity. Compaired among four identity status, distrust was the highest and trust (for self and for others) was the lowest in identity diffusion. On the contrary, distrust was the lowest and trust was the highest in moratorium, the status of those with an active struggle to make commitments. Those results suggested that trust might be some kind of energy for searching one's capabilities. Although identity achievement and foreclosure showed no significant differences in quantity on the trust scale, their qualities had special meanings from the SD scale for trust images.